1. 

Get-AppxPackage -all *shellexperience* -packagetype bundle |% {Add-AppxPackage -register -disabledevelopmentmode ($_.installlocation + “\appxmetadata\appxbundlemanifest.xml”)}

2.

 CD /d "%LOCALAPPDATA%\Packages\Microsoft.Windows.Cortana_cw5n1h2txyewy"
 Taskkill /F /IM SearchUI.exe 
 RD /S /Q Settings 

3.

REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced" /V EnableXamlStartMenu /T REG_DWORD /D 0 /F
taskkill /f /im explorer.exe
explorer.exe